fix compilation of tools and add them into tools/[make|clean]_all_examples

tools/clean_all_examples

 saved_pwd_before_making=$PWD
-for file in `find example -name Makefile`; do
+for file in `find example tools -name Makefile`; do
     cd $(dirname $file)
     echo -e "\n[$file]"
     make -s clean

tools/make_all_examples

 saved_pwd_before_making=$PWD
-for file in `find example -name Makefile`; do
+for file in `find example tools -name Makefile`; do
     cd $(dirname $file)
     echo -e "\n[$file]"
     make -sj4

tools/parallel_http/Makefile

 BRPC_PATH = ../../
 include $(BRPC_PATH)/config.mk
-CXXFLAGS = -std=c++0x -g -DNDEBUG -O2 -D__const__= -pipe -W -Wall -Werror -fPIC -fno-omit-frame-pointer -Wno-unused-parameter
+CXXFLAGS = $(CPPFLAGS) -std=c++0x -g -DNDEBUG -O2 -D__const__= -pipe -W -Wall -Werror -fPIC -fno-omit-frame-pointer -Wno-unused-parameter
 HDRPATHS = -I$(BRPC_PATH)/output/include $(addprefix -I, $(HDRS))
 LIBPATHS = -L$(BRPC_PATH)/output/lib $(addprefix -L, $(LIBS))
 STATIC_LINKINGS += -lbrpc

tools/rpc_press/Makefile

 BRPC_PATH = ../../
 include $(BRPC_PATH)/config.mk
-CXXFLAGS = -std=c++0x -g -DNDEBUG -O2 -D__const__= -pipe -W -Wall -Werror -fPIC -fno-omit-frame-pointer -Wno-unused-parameter
+CXXFLAGS = $(CPPFLAGS) -std=c++0x -g -DNDEBUG -O2 -D__const__= -pipe -W -Wall -Werror -fPIC -fno-omit-frame-pointer -Wno-unused-parameter
 HDRPATHS = -I$(BRPC_PATH)/output/include $(addprefix -I, $(HDRS))
 LIBPATHS = -L$(BRPC_PATH)/output/lib $(addprefix -L, $(LIBS))
 STATIC_LINKINGS += -lbrpc

tools/rpc_replay/Makefile

 BRPC_PATH = ../../
 include $(BRPC_PATH)/config.mk
-CXXFLAGS = -std=c++0x -g -DNDEBUG -O2 -D__const__= -pipe -W -Wall -Werror -fPIC -fno-omit-frame-pointer -Wno-unused-parameter
+CXXFLAGS = $(CPPFLAGS) -std=c++0x -g -DNDEBUG -O2 -D__const__= -pipe -W -Wall -Werror -fPIC -fno-omit-frame-pointer -Wno-unused-parameter
 HDRPATHS = -I$(BRPC_PATH)/output/include $(addprefix -I, $(HDRS))
 LIBPATHS = -L$(BRPC_PATH)/output/lib $(addprefix -L, $(LIBS))
 STATIC_LINKINGS += -lbrpc

tools/rpc_view/Makefile

@@ -3,7 +3,7 @@ include $(BRPC_PATH)/config.mk
 # Notes on the flags:
 # 1. Added -fno-omit-frame-pointer: perf/tcmalloc-profiler use frame pointers by default
 # 2. Added -D__const__= : Avoid over-optimizations of TLS variables by GCC>=4.8
-CXXFLAGS = -std=c++0x -g -DNDEBUG -O2 -D__const__= -pipe -W -Wall -Werror -Wno-unused-parameter -fPIC -fno-omit-frame-pointer
+CXXFLAGS = $(CPPFLAGS) -std=c++0x -g -DNDEBUG -O2 -D__const__= -pipe -W -Wall -Werror -Wno-unused-parameter -fPIC -fno-omit-frame-pointer
 HDRPATHS = -I$(BRPC_PATH)/output/include $(addprefix -I, $(HDRS))
 LIBPATHS = -L$(BRPC_PATH)/output/lib $(addprefix -L, $(LIBS))
 STATIC_LINKINGS += -lbrpc
@@ -25,7 +25,7 @@ clean:
 
 rpc_view:$(PROTO_OBJS) $(CLIENT_OBJS)
 	@echo "Linking $@"
-	$(CXX) $(LIBPATHS) -Xlinker "-(" $^ -Wl,-Bstatic $(STATIC_LINKINGS) -Wl,-Bdynamic -Xlinker "-)" $(DYNAMIC_LINKINGS) -o $@
+	@$(CXX) $(LIBPATHS) -Xlinker "-(" $^ -Wl,-Bstatic $(STATIC_LINKINGS) -Wl,-Bdynamic -Xlinker "-)" $(DYNAMIC_LINKINGS) -o $@
 
 %.pb.cc %.pb.h:%.proto
 	@echo "Generating $@"

tools/trackme_server/Makefile

 BRPC_PATH = ../../
 include $(BRPC_PATH)/config.mk
-CXXFLAGS = -std=c++0x -g -DNDEBUG -O2 -D__const__= -pipe -W -Wall -Werror -fPIC -fno-omit-frame-pointer
+CXXFLAGS = $(CPPFLAGS) -std=c++0x -g -DNDEBUG -O2 -D__const__= -pipe -W -Wall -Werror -fPIC -fno-omit-frame-pointer
 HDRPATHS = -I$(BRPC_PATH)/output/include $(addprefix -I, $(HDRS))
 LIBPATHS = -L$(BRPC_PATH)/output/lib $(addprefix -L, $(LIBS))
 STATIC_LINKINGS += -lbrpc